: Owen believes he is being stalked after receiving a series of unsettling anonymous "gifts." The investigation leads to a confrontation that forces Owen to face his past actions.
: Struggling with the void left by her husband, Charles.
: Owen's love interest who finds herself caught in the middle of the stalking incidents. [S3E12] Negative Space
: Dealing with the fallout of his past and the mysterious packages.
: Tommy Vega continues to navigate life after her husband's death, dealing with the emotional weight of "negative space" in her home and life. : Owen believes he is being stalked after
: The primary conflict involves the early release of Billy Tyson from prison, which causes significant tension for Captain Owen Strand.
: The 126 responds to a bizarre and dangerous emergency involving a donor organ transport that goes awry when the courier's car is impounded with the heart still inside. Key Characters : Dealing with the fallout of his past
The episode follows several intersecting storylines involving personal grief and professional duty: